Our bras are based on the measurements in the size chart below, not clothing sizing or standard Australian bra measurements.
Our bras are designed for smaller bodies, so we recommend following the steps below to get the best fit.
Please read it carefully and get your tape measure ready!
Step 1. With a tape measure, measure the area that sits right under your breasts. This is your band size.
Step 2. Then measure around the fullest part of your breasts to work out your cup size.
Step 3. Review the size chart below to find your bra size.
We understand how tricky it can be to find the right size for girls/teens, especially when buying a bra online.
That’s why we’ve designed our bras with flexibility and comfort front of mind.
Our soft, stretchy fabric and supportive bands mean each size covers a range of bust sizes.
Our bras feature flexi cup sizing designed to fit a range of bust sizes within each cup size.
Instead of rigid, exact cup measurements, our sizes cover a gentle overlap (for example, A-B or B-C cups), so there’s built-in flexibility, comfort and room to grow.
If her measurements fall between two sizes, we recommend choosing the larger band size.
If you're unsure about your size, please send an email to: hello@sisterkit.com.au with your measurements and we can help!
If you don't have the right fit the first time, we offer easy exchanges. We know it can be tricky to purchase a bra without trying it on first, we're here to help.
